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research article
Excitation spectrum of the two-dimensional attractive Hubbard model
Capezzali, Massimiliano
•
Beck, Hans
1999
We calculate the one-particle spectral functions above the superconducting transition temperature TC, in the framework of a functional integral approach. The coupling of the electronic self-energy to pair fluctuations, which are treated by means of a time-dependent Ginzburg–Landau equation, yields a double-peak structure, around the Fermi wavenumber. The peak separation is essentially temperature-independent, but the structure sharpens when TC is approached.
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Name
1999 Physica C.pdf
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Publisher's version
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restricted
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92.87 KB
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Adobe PDF
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